/* ==========================================================
   page-about / 品牌档案
   页面专属样式，全部限定在 .page-about 作用域内
   ========================================================== */

.page-about {
  --ab-rule: rgba(243, 231, 211, .13);
  --ab-panel: rgba(23, 19, 28, .72);
  --ab-glow: rgba(74, 107, 255, .28);
  color: var(--cream);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .about-crumbs {
  padding-top: var(--sp3);
}

/* ---------------- 首屏 ---------------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: var(--sp4) 0 var(--sp5);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -30% -20% 22% -20%;
  background:
    radial-gradient(54% 68% at 10% 22%, var(--ab-glow), transparent 68%),
    radial-gradient(48% 62% at 90% 6%, rgba(138, 92, 255, .24), transparent 70%),
    radial-gradient(44% 58% at 55% 116%, rgba(225, 6, 0, .20), transparent 72%);
  filter: blur(4px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero__title {
  margin: var(--sp2) 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 62px);
  line-height: 1.16;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-about .about-hero__accent {
  background: var(--grad-hot);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.page-about .about-hero__lede {
  margin: var(--sp3) 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: var(--sp4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp3) var(--sp2);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  padding-left: var(--sp2);
  border-left: 2px solid var(--red);
}

.page-about .about-hero__facts li:nth-child(2) { border-left-color: var(--orange); }
.page-about .about-hero__facts li:nth-child(3) { border-left-color: var(--blue); }
.page-about .about-hero__facts li:nth-child(4) { border-left-color: var(--cyan); }

.page-about .about-hero__fig {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 5.2vw, 32px);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--cream);
}

.page-about .about-hero__cap {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--sp3);
  }
}

/* ---------------- 开篇叙事 ---------------- */

.page-about .about-narrative {
  padding: 0 0 var(--sp5);
}

.page-about .about-narrative__grid {
  display: grid;
  gap: var(--sp4);
}

.page-about .about-narrative__lead {
  margin: 0 0 var(--sp3);
  padding-left: var(--sp3);
  border-left: 3px solid var(--red);
  font-family: var(--font-serif);
  font-size: clamp(20px, 4.6vw, 30px);
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-narrative__copy p {
  margin: 0 0 var(--sp3);
  font-size: 17px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-narrative__copy p:last-child {
  margin-bottom: 0;
}

.page-about .dropcap > p:first-child::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 3.15em;
  line-height: .84;
  padding: .06em .14em 0 0;
  color: var(--red);
}

.page-about .about-narrative__figure {
  margin: 0;
}

.page-about .about-narrative__figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--ab-rule);
  border-radius: var(--r-lg);
  background: var(--ink-2);
}

.page-about .media-frame__caption {
  display: block;
  margin-top: var(--sp2);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-narrative__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: var(--sp5);
    align-items: start;
  }
}

/* ---------------- 品牌短句呼吸段 ---------------- */

.page-about .about-breath {
  padding: var(--sp5) 0;
  border-top: 1px solid var(--ab-rule);
  border-bottom: 1px solid var(--ab-rule);
  background: linear-gradient(180deg, rgba(11, 10, 15, 0), rgba(74, 107, 255, .11) 46%, rgba(11, 10, 15, 0));
}

.page-about .about-breath__line {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(26px, 7vw, 52px);
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-about .about-breath__sub {
  margin: var(--sp3) 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------------- 时间线主区块 ---------------- */

.page-about .about-timeline {
  padding: 0 0 var(--sp5);
}

.page-about .about-timeline__banner {
  margin: 0 0 var(--sp5);
  overflow: hidden;
  border: 1px solid var(--ab-rule);
  border-radius: var(--r-lg);
  background: var(--ink-2);
}

.page-about .about-timeline__banner img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-body {
  display: grid;
  gap: var(--sp5);
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--sp5);
    align-items: start;
  }
}

/* 章节标题组 */

.page-about .about-head {
  margin: 0 0 var(--sp4);
}

.page-about .about-head h2 {
  margin: var(--sp2) 0 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--cream);
}

.page-about .about-head__note {
  margin: var(--sp2) 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.72;
  color: var(--paper);
}

/* ---------------- 时间线 ---------------- */

.page-about .era-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .era {
  position: relative;
  padding: 0 0 var(--sp4) var(--sp3);
  border-left: 1px solid var(--line-strong);
}

.page-about .era:last-child {
  padding-bottom: 0;
}

.page-about .era::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(225, 6, 0, .15), 0 0 16px rgba(225, 6, 0, .6);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}

.page-about .era:nth-child(even)::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 232, 200, .14), 0 0 16px rgba(56, 232, 200, .5);
}

.page-about .era:hover::before {
  transform: scale(1.35);
}

.page-about .era__span {
  display: block;
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--red-text);
}

.page-about .era:nth-child(even) .era__span {
  color: var(--cyan);
}

.page-about .era__tag {
  display: inline-block;
  margin: 0 0 var(--sp2);
  padding: 2px 10px;
  border: 1px solid var(--ab-rule);
  border-radius: 99px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .era__title {
  margin: 0 0 var(--sp2);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .era__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .era-list > .era:nth-child(1) { --reveal-delay: 0ms; }
.page-about .era-list > .era:nth-child(2) { --reveal-delay: 80ms; }
.page-about .era-list > .era:nth-child(3) { --reveal-delay: 160ms; }
.page-about .era-list > .era:nth-child(4) { --reveal-delay: 240ms; }

/* ---------------- 团队分工 ---------------- */

.page-about .team-band {
  display: flex;
  gap: 6px;
  height: 76px;
  margin: 0 0 var(--sp2);
}

.page-about .team-band__seg {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  min-width: 0;
  padding: 0 12px;
  border-radius: 8px;
  overflow: hidden;
}

.page-about .team-band__seg--editorial {
  flex: 14 1 0;
  background: linear-gradient(150deg, #E10600, #FF3D2E 92%);
}

.page-about .team-band__seg--tech {
  flex: 16 1 0;
  background: linear-gradient(150deg, #4A6BFF, #8A5CFF 92%);
}

.page-about .team-band__seg--support {
  flex: 12 1 0;
  background: linear-gradient(150deg, #1B9E8B, #38E8C8 92%);
}

.page-about .team-band__pct {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  color: #FFFFFF;
}

.page-about .team-band__name {
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .team-rows {
  list-style: none;
  margin: var(--sp3) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px var(--sp2);
  padding: var(--sp3);
  border: 1px solid var(--ab-rule);
  border-radius: var(--r);
  background: var(--ab-panel);
  backdrop-filter: blur(6px);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .team-row:hover {
  border-color: rgba(243, 231, 211, .32);
  transform: translateX(4px);
}

.page-about .team-row__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .team-row__num {
  font-family: var(--font-mono);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .team-row__duty {
  grid-column: 1 / -1;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .team-row:nth-child(1) .team-row__num { color: var(--red-text); }
.page-about .team-row:nth-child(2) .team-row__num { color: var(--violet); }
.page-about .team-row:nth-child(3) .team-row__num { color: var(--cyan); }

/* ---------------- 更新节奏 ---------------- */

.page-about .about-rhythm {
  margin-top: var(--sp5);
}

.page-about .rhythm-strip {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-about .rhythm-strip__cell {
  padding: var(--sp3);
  border-top: 3px solid var(--violet);
  border-radius: 0 0 var(--r) var(--r);
  background: linear-gradient(180deg, rgba(138, 92, 255, .16), rgba(23, 19, 28, 0));
}

.page-about .rhythm-strip__cell:nth-child(1) {
  border-top-color: var(--red);
  background: linear-gradient(180deg, rgba(225, 6, 0, .16), rgba(23, 19, 28, 0));
}

.page-about .rhythm-strip__cell:nth-child(3) {
  border-top-color: var(--cyan);
  background: linear-gradient(180deg, rgba(56, 232, 200, .14), rgba(23, 19, 28, 0));
}

.page-about .rhythm-strip__freq {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .rhythm-strip__num {
  margin: 6px 0 var(--sp2);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--cream);
}

.page-about .rhythm-strip__what {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 700px) {
  .page-about .rhythm-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .flow {
  margin-top: var(--sp3);
  padding: var(--sp3);
  border: 1px dashed rgba(243, 231, 211, .22);
  border-radius: var(--r);
  background: rgba(11, 10, 15, .4);
}

.page-about .flow__label {
  margin: 0 0 var(--sp3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: flow;
  display: grid;
  gap: 10px;
}

.page-about .flow__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: var(--sp2);
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper);
}

.page-about .flow__list li::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--red-text);
}

.page-about .about-rhythm__link {
  margin: var(--sp3) 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-rhythm__link a {
  color: var(--red-text);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 94, .45);
}

.page-about .about-rhythm__link a:hover {
  border-bottom-color: var(--red-text);
}

/* ---------------- 服务版图 ---------------- */

.page-about .about-coverage {
  margin-top: var(--sp5);
  padding-top: var(--sp5);
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: var(--sp4);
}

.page-about .about-coverage__copy h2 {
  margin: var(--sp2) 0 var(--sp3);
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(24px, 5vw, 36px);
  line-height: 1.26;
  color: var(--cream);
}

.page-about .about-coverage__copy p {
  margin: 0 0 var(--sp3);
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .coverage-facts {
  list-style: none;
  margin: var(--sp3) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp3);
}

.page-about .coverage-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .coverage-facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .coverage-facts li span:last-child {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-about .about-coverage__figure {
  margin: 0;
  max-width: 400px;
}

.page-about .about-coverage__figure img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--ab-rule);
  border-radius: var(--r-lg);
}

@media (min-width: 620px) and (max-width: 1023px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: var(--sp4);
    align-items: start;
  }
}

/* ---------------- 版本与能力 ---------------- */

.page-about .about-version {
  margin-top: var(--sp5);
  padding: var(--sp5) 0;
  border-top: 1px solid var(--ab-rule);
  border-bottom: 1px solid var(--ab-rule);
  background: linear-gradient(180deg, rgba(11, 10, 15, 0), rgba(74, 107, 255, .10) 48%, rgba(11, 10, 15, 0));
}

.page-about .about-version__grid {
  display: grid;
  gap: var(--sp4);
}

.page-about .about-version__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .about-version__num {
  margin: var(--sp2) 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 11vw, 76px);
  line-height: 1;
  letter-spacing: .01em;
  background: var(--grad-neon);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.page-about .about-version__name {
  margin: var(--sp2) 0 0;
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--cream);
}

.page-about .about-version__copy h2 {
  margin: 0 0 var(--sp3);
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.26;
  color: var(--cream);
}

.page-about .about-version__copy > p {
  margin: 0 0 var(--sp4);
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .version-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp3);
}

.page-about .version-points li {
  padding-left: var(--sp3);
  border-left: 2px solid var(--blue);
}

.page-about .version-points li:nth-child(2) { border-left-color: var(--red); }
.page-about .version-points li:nth-child(3) { border-left-color: var(--cyan); }

.page-about .version-points h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .version-points p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-version__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--sp5);
    align-items: start;
  }
}

/* ---------------- 合作方式 ---------------- */

.page-about .about-partner {
  padding: var(--sp5) 0 var(--sp6);
}

.page-about .partner-grid {
  display: grid;
  gap: var(--sp4);
}

.page-about .partner-grid__title {
  margin: 0 0 var(--sp3);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .cap-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .cap-list li {
  display: grid;
  gap: 6px;
  padding: var(--sp3) 0;
  border-bottom: 1px solid var(--ab-rule);
}

.page-about .cap-list li:first-child {
  border-top: 1px solid var(--ab-rule);
}

.page-about .cap-list__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .cap-list__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp2);
}

.page-about .stage-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp3);
  padding: var(--sp3);
  border: 1px solid var(--ab-rule);
  border-radius: var(--r);
  background: var(--ab-panel);
}

.page-about .stage-list__idx {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--red-text);
}

.page-about .stage-list__item h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .stage-list__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .partner-cta {
  margin-top: var(--sp5);
  padding: var(--sp4) var(--sp3);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, #F3E7D3, #E4D6BC);
  color: var(--ink);
  display: grid;
  gap: var(--sp3);
  justify-items: start;
}

.page-about .partner-cta p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: #2A2230;
}

@media (min-width: 880px) {
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: var(--sp5);
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .partner-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--sp4);
    padding: var(--sp5);
  }

  .page-about .partner-cta .btn {
    justify-self: end;
  }
}

/* ---------------- 窄屏微调 ---------------- */

@media (max-width: 560px) {
  .page-about .team-band {
    height: 52px;
  }

  .page-about .team-band__seg {
    padding: 0 8px;
  }

  .page-about .team-band__name {
    display: none;
  }

  .page-about .team-band__pct {
    font-size: 16px;
  }
}

@media (max-width: 420px) {
  .page-about .about-hero__facts {
    gap: var(--sp3) var(--sp2);
  }

  .page-about .rhythm-strip__num {
    font-size: 21px;
  }
}

/* ---------------- 动效降级 ---------------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .era::before,
  .page-about .team-row {
    transition: none;
  }

  .page-about .era:hover::before {
    transform: none;
  }

  .page-about .team-row:hover {
    transform: none;
  }
}